You will have 30 minutes on the water, around a triangular buoyed course in St. Aubin's Bay. The jet skis are three seaters, you can drive solo from the age of 12 but you must be over 18 to take a passenger, minimum passenger age is eight.
The Jersey Sea Sport Centre is at La Haule, just by St. Aubin's Village. Look for the flags and the jet ski at the top of the slipway. There is free parking on the slip and on the road at the top of the slip. If catching a bus, ask to get off at La Haule.